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Thread: ? Who has the answer to thes questions ?

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Old 05-22-2010, 04:37 PM   #1
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Default ? Who has the answer to thes questions ?

1. who makes wheel off sets? ( I just got some HB Rovers that are bigger than the stock wheels that all ready hit the springs when turning)

2. why would my MMP ESC cut all power when the steering gets jammed and can't go back to straight or neutral point? but when I was using a velineon vxl-3s I would not have this problem. (motor tekin 17.5 redline stock rotor waiting for the 14mm crawler)

3. why do my rear worm gears get very hot? up to 190 f. and the front only hit 86 f.
I have done the shimming and grease port. and every time i take the rear apart there is alway new metal shavings.

4. how did you set up your mmp esc? and what motor are you using? and pinion?
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Old 05-22-2010, 05:41 PM   #2
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are you running a BEC? if not thats your reason for the cutting out when turning, and id use a 12-14t pinion with a 17.5t motor
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Old 05-22-2010, 05:46 PM   #3
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1,4 duno but
2. the bec built in cant keep up with amp draw get an exterinal bec i.e. c.c bec(had same problem)
3. add grease to the rear and front diff its a pain but saves your stuff make a small hole and add a screw in the diff to add grease later with out taking it apart
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Old 05-22-2010, 06:12 PM   #4
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No i am not running a bec, I am just running 6v off the ESC. Is it hard to wire in a bec? the steering servo I'm running is a Hitec HS-7954SH it can run on 6v - 7.4v

I am using a 14 tooth pinion right know.

I all some do grease them every few runs. I put the screw in the worm gear case and I have a syringe to fill them.
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Old 05-22-2010, 06:54 PM   #5
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1-dont know
2-you need an external bec, its not hard, make sure you cut the red wire going to the MMP
3-drill the hole and grease with lithium grease or green slime
4-follow the manual (if you dont have it you can get in on castles website), also get a castle link. I run a tekin 21.5 with a 14mm rotor and a 14t pinion, im going to try a 15t
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Old 05-22-2010, 07:07 PM   #6
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1. Vanquish Products
2. You need a BEC
3. Sounds like your rear gear that was cut improperly.
4. Get the castle link it makes programming alot simpler.
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Old 05-22-2010, 07:17 PM   #7
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Quote:
Originally Posted by mik236 View Post
1. who makes wheel off sets? ( I just got some HB Rovers that are bigger than the stock wheels that all ready hit the springs when turning)

It does it on all the 5.5'' tires at full lock and articulated. If your popping the springs off the lower cups when running due to this you could try some shrink wrap on the cup and spring end. Ive seen it done on someone else rig and looked like it would work well.

2. why would my MMP ESC cut all power when the steering gets jammed and can't go back to straight or neutral point? but when I was using a velineon vxl-3s I would not have this problem. (motor tekin 17.5 redline stock rotor waiting for the 14mm crawler)

Get a Castle BEC, if it still does it then wire the BEC directly to the steering servo and use the ESC BEC for the dig servo.

14MM Rotor might not be a good choice. I have the 13MM High Torque one in my 17.5 and I sometimes get a COG feeling out of it on the low throttle when climbing.

3. why do my rear worm gears get very hot? up to 190 f. and the front only hit 86 f.
I have done the shimming and grease port. and every time i take the rear apart there is alway new metal shavings.

If you have checked your rear gear for the proper cut, teeth slope down to the right, then check all your axle housing screws that they are not stripped out. If any of the screws are stripped out you may be forcing the case apart causing the worm and spool not to mesh properly. The 2mm screws are very easy to strip out.

4. how did you set up your mmp esc? and what motor are you using? and pinion?

Cant speak on the MMP I use the Tekin RS for mine but with the 17.5 Redline and 13MM HT rotor Im geared at a 13T pinion.

Hope that helps.
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Old 05-22-2010, 09:13 PM   #8
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do you think the larger rotor have more cogging then the smaller stock ones?
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Old 05-22-2010, 10:58 PM   #9
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the larger rotor should make more torque therefore cog less
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Old 05-23-2010, 12:12 AM   #10
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Just a thought, but doesn't the mamba pro have an adjustable internal bec similar to the external one the sell? I would turn it up as far as your servo allows and see if it still cuts out.
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Old 05-23-2010, 01:29 AM   #11
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Quote:
Originally Posted by losichick View Post
Just a thought, but doesn't the mamba pro have an adjustable internal bec similar to the external one the sell? I would turn it up as far as your servo allows and see if it still cuts out.
Ya I just tried that I turned it to 6.0v it was at 5.5v but it did not fix it
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Old 05-23-2010, 10:06 AM   #12
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the larger rotors vs stock rotors will make it cog more so.
on my mmp i have lipo cutoff set to auto 3.3v
reverse throttle 100%
drag brake disabled
start power high
theres some to start with i cant remember my other settings
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Old 05-23-2010, 02:40 PM   #13
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1-dont know
2-you need an external bec
3-dont know
4-follow the manual

hope that helps
michael
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